Jet pump



Dec. 5, 1933. J. BROOKS 1,938,008

JET PUMP 'Filed NOV. 16, 1931 in van for James B /r5, 2 5 @MM/WKSWPatented Dec. 5, 1933 1 PA rs NT err-ice JETPUMP" V JamestBrooksBrooklyn, N.

Application Novemeer 16', 193i- Seria1N'b. 575,351

4 Glaimsa (Cl... 230 95 My invention consists in-newr and.. usefulLimprovements .in. apparatus for controlling the consumptionoiproductsof combustion invarious- I-Ieretofore in' starting a, fire in atrolling-the combustionofthe fuel and theismoke discharged through thesmokestack has. carried; with-it-varying quantities of combustibleprod.- Aside. from. the lossof heat units carried away with? uctssuch asgases, soot and the like.

the smoke, theatmosphere has been filled with. heavyclouds of theseproducts which; are in jurious to property andhealthl. I

withfurnaces of. any character whatsoever. and

which, as before stated, will causeqthereturnof.

- combustible products to the fire-box. of! the: fur- .nacep With. the:above and which will: appear as the description proceeds;

invention. consists in the novelfeatures herein: set. -'I" orth,-.illustrated: in the: accompanying, drawingand: more particularly pointedout: in-

the appended claims.

' Ref erringptothe drawing in throughout the several'v-iews,

the combined suction and-pressure.units;

Fig. 3:isa similar. view of.- a modified form. of;

. suction and pressure unit. a Fig. 4. is a perspective view of the.cylindrical sleeve member. which forms a part of the suction-pressureunit. 1

Fig 5 is a perspective co1lar,,and' V a Fig. 6-isa view from theunderside of. one of.-

the. suction-pressure. units showing the air=.. in

take and controlling means.

furnace, con siderable difficulty has been encountered-in con-'- otherobjects in view which numerals. of. like character designate. similar.parts Fig. 1 is-anelevation showing the var-iousele- .ments assembled. VI Fig. 2: is a transversesection showing, one. of:

view. of the retaining annular chamber 6,.one .wall of which is pro-'-vided with a threaded. radial opening. 7 to receive a tube. 8.hereinafter referredito' more. in.

detaiL.

Toward the. threaded! end" of. the conduit 2, the walls thereof. extendaxially for a slightly greater distance'. than the main inner boundariesof." the conduit'fand'fform an annular shoulder member. 9., Thisshoulder is adapted to' snugly engagea portionofithe periphery of anannular sleeve. 10, one end of which extends outwardly in. a. flangemember 11 fer engaging. one face ofl'saidishoulder. whereby whenthethreaded re-. taiiiing collar 12'. is screwed into the internal'threads..5: in'the conduit. 2, the sleeve is rigidly held in placeandcentralized'in the conduit.

t. will'ibe not'ed'that the sleeve 10 extends longitudinally. in theconduit-Etc a point slightly beyond the outer extremity of the'chamber6, the periphery of said sleeveat'this point being spaced apart from theinner circumference of the conduit to form a restricted annularopenihgflX.

n1. the' form ofmy. invention shown in Fig.1 wherein the apparatus isparticularly adaptable for. use in the conve'ntionalsteam boilerfurnace, 131 representsa pipe line leading from a suitable point in thesmok'e'stack (not. shown). The lower end of the pipe line 13 ispreferabl'y'prov-i'ded with a.T'1i, the opposite ends of which carry.pipes l5.andi16, each. of'whichis in communication. with. the pipe line.13. To the ends ofl'eachoffthepiicxe's 15 and. 16 I. secure by any.suitable means Us 17' which are provided with air. intake openings 18v(Fig.6) and are equipped with suitable valves. 19 for controlling theadmission offair. at 1'8, 'allasherei'nafter described more in detailltheoppositeendlof' the Us 17 I secure my improved suctionrpressure units1, preferably through the medium of external threads 20. 21v representsapressure line. which may lead from any suitable source. such. as. steam,compressed air or the like, said? pressure line beingplaced incommunication. with. the annular chamber. 6' through. the medium of.tubesi8 which are con.- nected into the threadedradial openings 7 in thewall'srof said chambers. I. I I

If desired, I may interpose in the. pipe line 13' leading from thesmokestack an auxiliary suction-pressure unit 1a which is practicallyiden-' tical in structure with the suction-pressure unit heretoforedescribed, with the exception that instead of the flaring mouth 4, thecorresponding end of the conduit 2a is threaded as at' 22 to enable theunit to be connected into the pipe line. The pressure chamber 611 of theauxiliary unit la is placed in communication with the pressure line 21through the medium of a valved tube Set as clearly shown in Fig. 1.

Having thus described the construction and assembly of my improvedsuction-pressure unit and one form of installation, its operation is asfollows: a

Assuming for example that the device is in stalled in a conventionalsteam boiler furnace, the pressure line 21 is connected into the steamboiler, the pipe line 13 leading from the smokestack as hereinbeforestated.

In a furnace employing soft coal as a fuel, this device is preferablyset into operation only during coaling which may last for'varyingperiods according to the size and type of furnace,

and quality of coal, while in oil burners, the apparatus wouldpreferably be in continuous operation due to the continuous feed of oilfuel.

' The injection of steam from pipe line 21 through pipes 8 and 8a intothe annular chambers 6 and 6a causes a pressure adjacent the restrictedannular opening X and with it a suction through the sleeve 10. Thelatter being in communication with the smokestack through pipes l3, l5and 16, causes a suction in the smokestack which, during the period ofoperation draws the smoke and with it the combustible products into thesleeve 10. These products are mixed with the steam or other pressurefluid adjacent the annular opening X and the mixture is dischargedforcefully into the fire-box of the furnace where it is again subjectedto combustion.

It will benoted that by manipulating the valve 19, the admission of airthrough the aperture 18 is controlled, thus enabling the operator toregulate the oxygen content of the mixture discharged throughthe mouth4. It will also be noted that the suction-pressure units may beindividually controlled and may be used either singly or in varyinggroups. For example, by shutting off the valve 829 the unit 1a will berendered inoperative, yet still functioning as a conduit for the passageof smoke into the units 1. If desired, suitable valves may be installedin the tubes 8 to control the respective units.

By regulating the valve 23 the passage of steam or other pressure fluidmay be controlled as to the amount'of pressure required and when it isdesired to discontinue the use of the suctionpressure units in theirentirety, this valve 23 is closed.

Obviously with a device of this character such elements as smoke, gases,soot and the like are consumed in the fire-box and are thus preventedfrom being discharged through the Smokestack to cloud the atmosphere,deface surrounding property and effect the health of those in the nearvicinity.

From the foregoing it is believed that the objects and advantages of myinvention may be readily understood by those skilled in the art withoutfurther description, it being borne in mind that numerous changes may bemade in the details of construction without departing from the spirit ofthe invention as set out in the following claims.

What I claim and desire to secure by Letters Patent is:-

1. A jet pump comprising an elongated body portion having relativelythick longitudinal walls, a cylindrical conduit extending through saidbody portion, an annular recess in the inner wall of said conduitintermediate the longitudinal extremities thereof forming a pressurechamber, said inner wall being thickened adjacent one end of saidchamber, a substantially elongated cylindrical sleeve of uniformdiameter adapted to slidably engage said thickened portion at one end,its other end terminating within said conduit a relatively shortdistance beyond said chamber and being'slightly spaced apart from thewall of said conduit to form a short restricted annular passagewayextending parallel to the axis of said conduit, means for removablysecuring said sleeve in place, and means for introducing a pressurefluid into said chamber whereby a suction is created through saidsleeve.

2. A jet pump comprising an elongated body portion having relativelythick longitudinal walls,

a cylindrical conduit extending through said body portion, an annularrecess in the inner wall of said conduit intermediate the longitudinalextremities thereof forming a pressure chamber, said inner wallbeing'thickened adjacent one end of said chamber, a substantiallyelongated cylindrical sleeve of uniform diameter adapted to slidablyengage said thickened portion at one end, its other end terminatingwithin said conduct a short distance beyond said chamber in spacedrelation to the wall of said co'nduit, to form'a short restrictedannular passageway extending parallel to the axis of said conduit, anannular shoulder on said sleeve adjacent said thickened portion, adaptedto lie within a complementary inset in the end of said body portion,means for removably securing said'sleeve in place, and means forintroducing a pressure fluid into said chamber whereby a suction iscreated through said sleeve.

3. A jet pump as claimed in claim 2 wherein said sleeve is removablysecured in place by means of an externally threaded collar adapted toengage complementary threads in said inset.

4. A jet pump comprising an elongated cylindrical body portion havingrelatively thick'longi tudinal walls, a cylindrical conduit extendingthrough said body portion and terminating in a flaring mouth at itsdischarge end, a portion of said conduit being enlarged to form asubstantially annular pressure chamber lying entirely within the radialconfines of said body portion, an elongated cylindrical sleeve ofuniform chamber, whereby a pressure is created-in the conduit whichcauses a suction through said sleeve.

JAMES BROOKS.

